Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Question

what is the incident beam 

  1. it is the beam of light that exits the sample
  2. it is the beam of light is absorbed by the sample
  3. it is the initial beam of chemical energy that projected into the sample in a spectrophotometer 
  4. it is the beam of light that converts light energy into electrical energy in a spectrophotometer 
  5. it is the initial beam of light that is projected from the light source in a  spectrophotometer 

-wich of the following researches described DNA as helical using X-ray diffraction studies.

  1. Maurice Wiking and Rosalind franklin 
  2. Erwin chargaff and Rosalind franklin
  3. James Watson and Francis Crick 
  4. Francis crick and Albert Kossel
  5. Johann mischief and albert kossel 

beer’s law establishes a direct relationship between absorption and 

  1. temperature
  2. wavelength 
  3. osmosis
  4. concentration
  5. pH
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